The transition to PCIe 4.0 enables a faster and more powerful generation of NVMe SSDs: the high-performance HP FX900 uses its PCIe Gen 4 x4 controller to support the new NVMe 1.4 high-speed protocol and ECC (Error Correction Code) based on 4K LDPC technology. Sequential read and write speeds can reach about 1.6 times faster than the data transfer rate of PCIe 3.0.